Fig. 1

A IBS curves from basal anterior septum (yellow curve), inferolateral wall (blue curve) and pericardium (red curve) as determined from PLAX; B 2D longitudinal strain derived whole cycle IBS. Red curve – basal anterior septum; darker blue curve – middle segment of the septum; purple curve – apical segment of the septum; green curve – apical segment of the inferolateral wall; lighter blue curve – middle segment of the inferolateral wall; yellow curve – basal inferolateral wall; white curve – mean whole-cycle IBS. AVC – Aortic valve closure; IBS – Integrated backscatter; PLAX – parasternal long-axis view